CN105723233B - Inverter test device - Google Patents
Inverter test device Download PDFInfo
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- CN105723233B CN105723233B CN201480061522.0A CN201480061522A CN105723233B CN 105723233 B CN105723233 B CN 105723233B CN 201480061522 A CN201480061522 A CN 201480061522A CN 105723233 B CN105723233 B CN 105723233B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/487—Neutral point clamped inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/443—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means
- H02M5/45—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
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- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inverter Devices (AREA)
Abstract
The present invention is an inverter test device (10) for testing a single-phase inverter (1), the inverter test device (10) comprising: a DC power supply (5) for supplying DC power to the inverter (1); a test equipment inverter (2) connected to the DC side of the inverter (1); an inductor (4a) connected between the AC side of the inverter (1) and the AC side of the test equipment inverter (2); a PWM control unit (32) that controls the AC voltage of the inverter (1) to a fixed amplitude and a fixed frequency; a current detector (7) that detects a current (i) flowing through the inductor (4 a); a control unit (31) for calculating a phase command value (theta 2r) of the inverter (2) of the test device to control the current detected by the current detector (7); and a PWM control unit (33) for controlling the phase of the test equipment inverter (2) on the basis of the calculated phase command value (theta 2 r).
Description
Technical Field
The present invention relates to an inverter testing apparatus for testing an inverter.
Background
In general, various methods for testing an inverter are known.
For example, there is a method of performing a test by connecting an ac power supply to the ac side of an inverter to be tested. Further, the following is disclosed: that is, in the test method of the self-excited converter in which the reactor is connected to the load side of the single-phase inverter, an arbitrary 1-phase of the single-phase inverter is set to a switching state in a predetermined operating state, and the phase and amplitude of the remaining 1-phase are adjusted so that the phase of the phase current becomes-180 ° to 180 ° with respect to the voltage of the 1-phase (see patent document 1).
However, if an ac power supply is connected to the ac side of the inverter, the cost of the test apparatus increases. When an ac power source is not connected to the ac side of the inverter, it is difficult to test the inverter under the original energization conditions. For example, in the above test method, one of the two legs constituting the power conversion circuit is tested under a special energization condition, i.e., power running (power regeneration) and the other is tested under regeneration (regeneration).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. Hei 11-285265
Disclosure of Invention
The invention aims to provide an inverter testing device which can test an inverter under the current conduction condition close to reality.
An inverter test apparatus according to an aspect of the present invention is an inverter test apparatus for performing a test of a 1 st single-phase inverter, including: a DC power supply for supplying DC power to the 1 st single-phase inverter; a 2 nd single-phase inverter connected to a direct-current side of the 1 st single-phase inverter; an inductor connected between an ac side of the 1 st single phase inverter and an ac side of the 2 nd single phase inverter; a 1 st control unit for controlling the alternating voltage of the 1 st single-phase inverter to be a fixed amplitude and a fixed frequency; a current detection unit that detects a current flowing through the inductor; a phase command value calculation unit that calculates a phase command value of the 2 nd single-phase inverter to control the current detected by the current detection unit; and a 2 nd control unit that controls a phase of the 2 nd single-phase inverter based on the phase command value calculated by the phase command value calculation unit.
Drawings
Fig. 1 is a configuration diagram showing a configuration of an inverter test apparatus according to embodiment 1 of the present invention.
Fig. 2 is a circuit diagram showing an equivalent circuit of a test circuit of the inverter according to embodiment 1.
Fig. 3 is a configuration diagram showing a configuration of a control unit of the control device according to embodiment 1.
Fig. 4 is a phasor diagram in the power running operation with V1r being equal to V2r in the test circuit of the inverter according to embodiment 1.
Fig. 5 is a phasor diagram when regeneration is performed with V1r being equal to V2r in the test circuit of the inverter according to embodiment 1.
Fig. 6 is a phasor diagram in the power running with V1r > V2r in the test circuit of the inverter according to embodiment 1.
Fig. 7 is a phasor diagram when regeneration is performed with V1r > V2r in the test circuit of the inverter according to embodiment 1.
Fig. 8 is a configuration diagram showing a configuration of a control unit according to embodiment 2 of the present invention.
Detailed Description
(embodiment mode 1)
Fig. 1 is a configuration diagram showing a configuration of an inverter test apparatus 10 according to embodiment 1 of the present invention. In the drawings, the same components are denoted by the same reference numerals, and overlapping description thereof will be omitted as appropriate, and different components will be mainly described.
The inverter test apparatus 10 is an apparatus for testing the inverter 1. The inverter test apparatus 10 includes: the test apparatus includes a test apparatus inverter 2, a control device 3, 2 inductors 4a and 4b, a diode rectifier 5, an ac power supply 6, and a current detector 7.
The inverter 1 is a single-phase inverter and is a neutral-point clamped three-level inverter. The inverter 1 is controlled by PWM (pulse width modulation) to perform a power conversion operation.
The inverter 1 includes 8 switching elements 11a, 11b, 11c, 11d, 12a, 12b, 12c, 12d, 4 neutral point clamped diodes 13a, 13b, 13c, 13d, and 2 capacitors 14a, 14 b. The 8 switching elements 11a to 11d and 12a to 12d are connected to a reflux diode, respectively.
The 8 switching elements 11a to 11d, 12a to 12d constitute two legs (leg). The 1 st leg is configured by connecting 4 switching elements 11a to 11d in series. The switching elements 11a, 11b, 11c, and 11d are located on the positive side in this order. The 2 nd leg is configured by connecting 4 switching elements 12a to 12d in series. The switching elements 12a, 12b, 12c, and 12d are located on the positive electrode side in this order. The 1 st leg and the 2 nd leg are connected in parallel. Two capacitors 14a, 14b connected in series are connected in parallel with the two legs. The connection point of the two switching elements 11b, 11c positioned in the center of the 1 st leg and the connection point of the two switching elements 12b, 12c positioned in the center of the 2 nd leg become the single-phase ac-side terminals of the inverter 1.
Two neutral point clamp diodes 13a and 13b connected in series are connected to connect a connection point of the two switching elements 11a and 11b located on the positive side of the 1 st leg and a connection point of the two switching elements 11c and 11d located on the negative side of the 1 st leg. The neutral point clamping diodes 13a and 13b have cathode sides connected to the positive side and anode sides connected to the negative side.
Two neutral point clamp diodes 13c and 13d connected in series are connected so as to connect a connection point of the two switching elements 12a and 12b located on the positive side of the 2 nd leg and a connection point of the two switching elements 12c and 12d located on the negative side of the 2 nd leg. The neutral point clamping diodes 13c and 13d have cathode sides connected to the positive side and anode sides connected to the negative side.
The connection point of the two switching elements 12b and 12c located at the center of the 2 nd leg, the connection point of the two neutral point clamping diodes 13a and 13b provided in the 1 st leg, and the connection point of the two capacitors 14a and 14b are short-circuited as a neutral point of voltage. The positive side of the two legs becomes the positive terminal, and the negative side of the two legs becomes the negative terminal.
The diode rectifier 5 is connected to the dc side of the inverter 1 at three points, i.e., a positive terminal, a neutral terminal, and a negative terminal. The diode rectifier 5 is a dc power supply that supplies dc power to the inverter 1. The diode rectifier 5 converts the three-phase alternating current supplied from the alternating current power supply 6 into direct current, and outputs the direct current to the inverter 1. The ac power supply 5 is a commercial power supply or the like. In addition, a generator, a battery, a power conversion device, or the like may be provided instead of the diode rectifier 5 and the ac power supply 6, if used to output dc power.
The test equipment inverter 2 is a single-phase inverter and a neutral point clamped three-level inverter. The power conversion operation is performed by PWM controlling the test equipment inverter 2. The inverter 1 is connected to an inverter test apparatus 10, so that the dc side of the test device inverter 2 is connected to the dc side of the inverter 1. The test facility inverter 2 has the same configuration as the test target inverter 1, and therefore, detailed description thereof is omitted.
The test equipment inverter 2 includes 8 switching elements 21a, 21b, 21c, 21d, 22a, 22b, 22c, 22d, 4 neutral point clamped diodes 23a, 23b, 23c, 23d, and 2 capacitors 24a, 24 b. The 8 switching elements 21a to 21d and 22a to 22d are connected to a reflux diode, respectively.
The 3 rd leg is constituted by 4 switching elements 21a to 21 d. The 4 th leg is constituted by 4 switching elements 22a to 22 d. The 3 rd leg, the 4 th leg, and the two capacitors 24a, 24b connected in series are connected in parallel. The connection point of the two switching elements 21b, 21c positioned in the center of the 3 rd leg and the connection point of the two switching elements 22b, 22c positioned in the center of the 4 th leg become the single-phase ac-side terminals of the inverter 2. The connection point of the two neutral point clamping diodes 23a and 23b provided in the 3 rd leg, the connection point of the two neutral point clamping diodes 23c and 23d provided in the 4 th leg, and the connection point of the two capacitors 24a and 24b are short-circuited as a neutral point of the voltage. The positive side of the two legs becomes the positive terminal, and the negative side of the two legs becomes the negative terminal.
The connection point of the two switching elements 11b, 11c located in the center of the 1 st leg of the inverter 1 and the connection point of the two switching elements 21b, 21c located in the center of the 3 rd leg of the test equipment inverter 2 are connected via the inductor 4 a. The connection point of the two switching elements 12b, 12c located in the center of the 2 nd leg of the inverter 1 and the connection point of the two switching elements 22b, 22c located in the center of the 4 th leg of the test equipment inverter 2 are connected via the inductor 4 b. The dc sides of the inverter 1 and the test equipment inverter 2 are connected to each other at a positive electrode, a neutral point, and a negative electrode.
The current detector 7 is provided on the wire on which the inductor 4a is provided, and is closer to the inverter 1 side than the inductor 4 a. The current detector 7 detects the current i flowing through the inductor 4a and outputs the detected current i to the control device 3.
The control device 3 is a device that controls the inverter 1 and the test equipment inverter 2. The control device 3 includes a control unit 31, a PWM control unit 32, and a PWM control unit 33. The control unit 31 performs control based on the flowing current i detected by the current detector 7. The control unit 31 calculates a voltage command value v1r for the inverter 1 and a voltage command value v2r for the test equipment inverter 2. PWM control unit 32 performs PWM control of inverter 1 based on voltage command value v1r for inverter 1 calculated by control unit 31. The PWM control unit 33 PWM-controls the test equipment inverter 2 based on the voltage command value v2r for the test equipment inverter 2 calculated by the control unit 31. Thereby, the energization test of the inverter 1 is performed.
Next, the control performed by the control device 3 will be described.
Fig. 2 is a circuit diagram showing an equivalent circuit of the test circuit of the inverter 1. L represents the inductance of the inductors 4a, 4 b.
The control device 3 controls the single-phase ac voltage v1 of the inverter 1 and the single-phase ac voltage v2 of the test equipment inverter 2. The voltage command value v1r for the inverter 1 and the voltage command value v2r for the test equipment inverter 2 are provided as follows.
V1r ═ V1r xcos (ω r · t) … … formula (1)
V2r ═ V2r × cos (ω r · t + θ 2r) … … formula (2)
Here, V1r and V2r are voltage amplitude command values, ω r is an angular velocity command value, and θ 2r is a phase command value.
The control device 3 controls the ac voltage of the inverter 1 to a fixed amplitude and a fixed frequency, independently of the flowing current i. The control device 3 controls the amplitude of the ac voltage of the test equipment inverter 2 to be substantially constant, and performs current control by changing the phase command value θ 2r in accordance with the current i.
Fig. 3 is a configuration diagram showing a configuration of the control unit 31 of the control device 3.
The control unit 31 includes an effective value calculation unit 311, a subtractor 312, a PI (proportional-plus-integral) control unit 313, a polarity determination unit 314, and a voltage command value calculation unit 315.
The effective value calculation unit 311 calculates an effective value from the flowing current i (instantaneous value) detected by the current detector 7. The effective value calculation unit 311 outputs the current amplitude I obtained from the effective value to the subtractor 312.
The subtractor 312 subtracts the current amplitude I calculated by the effective value calculation unit 311 from a preset current amplitude command value Ir. Subtractor 312 outputs the calculation result to PI control unit 313. PI control unit 313 performs proportional-integral control so that the calculation result of subtractor 312 becomes zero. That is, the PI control unit 313 controls the current amplitude I to follow the current amplitude command value Ir. The PI control unit 313 outputs the calculation result to the polarity determination unit 314.
The polarity determining unit 314 multiplies the calculation result of the PI control unit 313 by the coefficient K for determining the polarity. When a power running test of the inverter 1 is performed, the coefficient K is 1. When a regeneration test of the inverter 1 is performed, the coefficient K is set to-1. The polarity determining unit 314 outputs the calculation result to the voltage command value calculating unit 315 as the phase command value θ 2 r. The set value of the coefficient K may be automatically switched according to a predetermined test plan or may be manually switched.
The voltage command value calculation unit 315 calculates a voltage command value v2r for the test equipment inverter 2 by equation (2) based on the phase command value θ 2r calculated by the polarity determination unit 314. The voltage command value calculation unit 315 outputs the calculated voltage command value v2r to the PWM control unit 33 that controls the test equipment inverter 2.
Next, the principle of control performed by the control device 3 will be described. Fig. 4 to 7 are phasor diagrams of different test conditions of the test circuit of the inverter 1.
Fig. 4 is a phasor diagram in the power running mode with V1r being equal to V2 r. Fig. 5 is a phasor diagram when regeneration is performed with V1r ═ V2 r. The energization current amplitude I is determined by a vector difference between the voltage v1 of the inverter 1 and the voltage v2 of the test equipment inverter 2. According to fig. 4 and 5, in the power running mode, the delay energization current amplitude I becomes larger as the phase becomes, and in the regeneration mode, the advance energization current amplitude I becomes larger as the phase becomes. Therefore, the polarity determining unit 314 changes the polarity during the power running and the regeneration.
Although fig. 4 and 5 show the case where V1r is equal to V2r, the power factor of the current i can be changed by setting V1r > V2 r.
FIG. 6 is a phasor diagram for power operation with V1r > V2 r. FIG. 7 is a phasor diagram for regeneration with V1r > V2 r. The power factor is delayed during the powering operation and advanced during the regeneration operation, and the rated current with the power factor reduced can be obtained compared with the case where V1r is V2 r. Namely, the following is shown: by reducing the voltage amplitude command value V2r of the test device inverter 2 with respect to the inverter 1 to be tested, it is possible to perform a power running or a regeneration test of a rated current at a rated voltage of an arbitrary power factor.
According to the present embodiment, the phase of the test equipment inverter 2 is changed based on the current i flowing through the inductor 4a, and the power factor can be adjusted by switching the power operation and the regeneration in the energization test in which the rated current is performed at the rated voltage of the inverter 1.
In the test performed by the inverter test apparatus 10, the conduction current i circulates between the inverter 1 and the test equipment inverter 2, and therefore the diode rectifier 5 only needs to have a capacity to provide a loss amount.
Since the inverter 1 and the test facility inverter 2 are single-phase inverters, current control of a single-phase circuit is necessary for performing a test. Therefore, the current control of the three-phase circuit by the general dq conversion cannot be performed. On the other hand, the control device 3 can perform current control using a single-phase circuit by setting only the energization current i as a feedback amount. For example, even when the inverter 1 is one of three units constituting a three-phase inverter circuit, the inverter 1 can be tested by a single-phase circuit as a single unit.
(embodiment mode 2)
Fig. 8 is a configuration diagram showing the configuration of the control unit 31A according to embodiment 2 of the present invention.
The inverter test apparatus 10 according to the present embodiment is an apparatus in which the control unit 31A replaces the control unit 31 of the control apparatus 3 shown in fig. 3 in embodiment 1. The other structure is the same as embodiment 1.
The control unit 31A is the control unit 31 according to embodiment 1, except that the polarity determination unit 314 and the voltage command value calculation unit 315A are used instead of the voltage command value calculation unit 315, and a power factor calculation unit 316, a subtractor 317, a PI control unit 318, and a subtractor 319 are added. The other points are the same as those of the control unit 31 according to embodiment 1.
In the method of calculating the phase command value θ 2r in the control unit 31A, the multiplication of the coefficient K by the polarity determination unit 314 in embodiment 1 is not performed, and the output of the PI control unit 313 is directly used as the phase command value θ 2 r. The calculated phase command value θ 2r is input to the voltage command value calculation unit 315A.
Next, a method of calculating the voltage amplitude command value V2r for the test equipment inverter 2 by the control unit 31A will be described.
The power factor calculator 316 receives the current i detected by the current detector 7. The power factor calculation unit 316 calculates a power factor cos Φ using a predetermined function based on the current i. The calculated power factor cos phi is processed as a current measured power factor value. The power factor calculator 316 outputs the calculated power factor cos Φ to the subtractor 317. Here, the power factor calculator 316 may calculate the power factor by using only the flowing current i, or may calculate the power factor by detecting the voltage v1 of the inverter 1.
The subtractor 317 subtracts the power factor cos Φ calculated by the power factor calculation unit 316 from a predetermined power factor command value cos Φ r. The subtractor 317 outputs the calculation result to the PI control unit 318. PI control unit 318 performs proportional-integral control so that the calculation result of subtractor 312 becomes zero. That is, the PI control unit 318 controls the power factor cos Φ to follow the power factor command value cos Φ r. The PI control unit 318 outputs the calculation result to the subtractor 319. The subtractor 319 subtracts the calculation result of the PI control unit 318 from a preset voltage amplitude command value V1r for the inverter 1. The subtractor 319 outputs the calculation result to the voltage command value calculation unit 315A as the voltage amplitude command value V2r for the test equipment inverter 2.
The phase command value θ 2r calculated by the PI control unit 313 and the voltage amplitude command value V2r calculated by the subtractor 319 are input to the voltage command value calculation unit 315A. The voltage command value calculation unit 315A calculates a voltage command value V2r for the test equipment inverter 2 by using equation (2) based on the voltage amplitude command value V2r and the phase command value θ 2 r. The voltage command value calculation unit 315A outputs the calculated voltage command value v2r to the PWM control unit 33 that controls the test equipment inverter 2.
According to the present embodiment, in addition to the operational effect of embodiment 1, the energization test can be performed such that the power factor cos Φ follows the power factor command value cos Φ r. For example, the power factor command value cos Φ r is programmed so as to change with time, so that a test in which the power factor cos Φ changes with time can be performed.
In embodiment 1, the control device 3 is provided with the polarity determining unit 314, and the polarity determining unit 314 may be omitted when only one of the power running test and the regeneration test is performed.
The inverter 1 and the test equipment inverter 2 are not limited to the devices described in the embodiments, and may be any single-phase inverter as long as they are single-phase inverters.
In each embodiment, the preset parameters can be set or changed according to test conditions and the like. These parameters may be updated automatically according to a predetermined test plan or manually.
The present invention is not limited to the above-described embodiments, and structural elements may be modified and embodied in the implementation stage without departing from the gist thereof. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, several components may be deleted from all the components shown in the embodiments. Further, the components according to the different embodiments may be appropriately combined.
Claims (4)
1. An inverter testing apparatus for testing a 1 st single-phase inverter, comprising:
a DC power supply for supplying DC power to the 1 st single-phase inverter;
a 2 nd single-phase inverter connected to a direct-current side of the 1 st single-phase inverter;
an inductor connected between an ac side of the 1 st single phase inverter and an ac side of the 2 nd single phase inverter;
a 1 st control unit for controlling the alternating voltage of the 1 st single-phase inverter to be a fixed amplitude and a fixed frequency;
a current detection unit that detects a current flowing through the inductor;
phase command value calculation means for calculating an effective value of the current detected by the current detection means, obtaining an energization current amplitude from the effective value, subtracting the energization current amplitude from a preset current amplitude command value, and performing proportional integral control so that a subtraction result becomes zero, wherein when a power running test of the 1 st single-phase inverter is performed, a calculation result of the proportional integral control is multiplied by a coefficient 1, and when a regeneration test of the 1 st single-phase inverter is performed, a calculation result of the proportional integral control is multiplied by a coefficient-1, and a phase command value of the 2 nd single-phase inverter is calculated so as to follow the current amplitude command value; and
a 2 nd control unit that controls a phase of the 2 nd single-phase inverter based on the phase command value calculated by the phase command value calculation unit.
2. The inverter testing apparatus according to claim 1,
includes a voltage amplitude command value calculating means for calculating a voltage amplitude command value of the 2 nd single-phase inverter based on the current detected by the current detecting means to control the power factor of the 1 st single-phase inverter,
the 2 nd control means controls the voltage amplitude of the 2 nd single-phase inverter based on the voltage amplitude command value calculated by the voltage amplitude command value calculation means.
3. An inverter test method for testing a 1 st single-phase inverter is characterized by comprising the following steps:
connecting a 2 nd single-phase inverter with the direct current side of the 1 st single-phase inverter;
connecting an inductor between an AC side of the 1 st single-phase inverter and an AC side of the 2 nd single-phase inverter;
controlling the alternating voltage of the 1 st single-phase inverter to be a fixed amplitude and a fixed frequency;
detecting a current flowing through the inductor;
calculating an effective value of the detected current, obtaining an energization current amplitude from the effective value, subtracting the energization current amplitude from a preset current amplitude command value, and performing proportional integral control so that a subtraction result becomes zero, wherein a calculation result of the proportional integral control is multiplied by a coefficient of 1 in a case where a power running test of the 1 st single-phase inverter is performed, and a phase command value of the 2 nd single-phase inverter is calculated by multiplying the calculation result of the proportional integral control by a coefficient of-1 in a case where a regeneration test of the 1 st single-phase inverter is performed, so that the phase command value of the 2 nd single-phase inverter follows the current amplitude command value; and
controlling a phase of the 2 nd single-phase inverter based on the calculated phase command value.
4. A control device of an inverter testing device, wherein a 2 nd single-phase inverter is connected to a dc side of a 1 st single-phase inverter, and an inductor is connected between an ac side of the 1 st single-phase inverter and an ac side of the 2 nd single-phase inverter to test the 1 st single-phase inverter, the control device of the inverter testing device comprising:
a 1 st control unit for controlling the alternating voltage of the 1 st single-phase inverter to be a fixed amplitude and a fixed frequency;
a current detection unit that detects a current flowing through the inductor;
phase command value calculation means for calculating an effective value of the current detected by the current detection means, obtaining an energization current amplitude from the effective value, subtracting the energization current amplitude from a preset current amplitude command value, and performing proportional integral control so that a subtraction result becomes zero, wherein when a power running test of the 1 st single-phase inverter is performed, a calculation result of the proportional integral control is multiplied by a coefficient 1, and when a regeneration test of the 1 st single-phase inverter is performed, a calculation result of the proportional integral control is multiplied by a coefficient-1, and a phase command value of the 2 nd single-phase inverter is calculated so as to follow the current amplitude command value; and
a 2 nd control unit that controls a phase of the 2 nd single-phase inverter based on the phase command value calculated by the phase command value calculation unit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2014/055995 WO2015132960A1 (en) | 2014-03-07 | 2014-03-07 | Inverter testing apparatus |
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| CN105723233A CN105723233A (en) | 2016-06-29 |
| CN105723233B true CN105723233B (en) | 2020-04-17 |
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| US (1) | US10509079B2 (en) |
| EP (1) | EP3116117B1 (en) |
| JP (1) | JP6186496B2 (en) |
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| JP6575252B2 (en) * | 2015-09-14 | 2019-09-18 | 富士電機株式会社 | Load simulator |
| EP3196713B1 (en) * | 2016-01-19 | 2021-07-21 | dSPACE digital signal processing and control engineering GmbH | Device and method for simulation |
| CN109642918B (en) * | 2016-08-24 | 2021-03-09 | 东芝三菱电机产业系统株式会社 | Power-on evaluation test device of input filter for pulse width modulation converter |
| KR101923690B1 (en) * | 2016-11-11 | 2018-11-29 | 엘에스산전 주식회사 | Synthetic test circuit for submodule performance test in a power compensator and testing method thereof |
| CN106771792B (en) * | 2017-03-29 | 2023-11-03 | 株洲中达特科电子科技有限公司 | Locomotive converter test system |
| JP6799674B2 (en) * | 2017-03-31 | 2020-12-16 | 本田技研工業株式会社 | vehicle |
| JP6977766B2 (en) * | 2017-03-31 | 2021-12-08 | 日本電産株式会社 | Power converter, motor drive unit and electric power steering device |
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| JP2000069765A (en) * | 1998-08-24 | 2000-03-03 | Yamabishi Denki Kk | Inverter testing apparatus |
| JP2008167655A (en) * | 2001-08-27 | 2008-07-17 | Shinko Electric Co Ltd | Inverter testing device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3116117A4 (en) | 2017-11-15 |
| US10509079B2 (en) | 2019-12-17 |
| EP3116117A1 (en) | 2017-01-11 |
| WO2015132960A1 (en) | 2015-09-11 |
| JP6186496B2 (en) | 2017-08-23 |
| CN105723233A (en) | 2016-06-29 |
| US20160377687A1 (en) | 2016-12-29 |
| EP3116117B1 (en) | 2023-07-05 |
| JPWO2015132960A1 (en) | 2017-03-30 |
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